MAX3222ECUP+TG071

Overview

The MAX3222ECUP+TG071 is a lead-free, RoHS-compliant RS-232 transceiver manufactured by Analog Devices Inc. (Maxim Integrated). It operates on a single +3.0V to +5.5V supply and features two drivers and two receivers for full-duplex communication. The device guarantees data rates up to 250kbps with worst-case loads of 3kΩ in parallel with 1000pF. It incorporates an internal dual charge pump requiring only four 0.1μF capacitors. ESD protection is rated at ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). The component includes a shutdown mode reducing supply current to less than 1μA while keeping receivers active. It is housed in a 20-TSSOP package.

Feature Summary

• Integrated dual charge pump enables true RS-232 performance from a single low-voltage supply using minimal external capacitance.
• Enhanced electrostatic discharge protection safeguards transmitter outputs and receiver inputs against high-voltage static events.
• Low-power shutdown mode significantly reduces energy consumption in battery-operated systems while maintaining receiver monitoring capability.

Applications

• Battery-powered portable equipment
• Cell phone and smartphone data cables
• Notebook, subnotebook, and palmtop computers

Procurement Notes

Verify the specific ordering suffix '+TG071' against official manufacturer documentation to confirm lead-free status and tape-and-reel packaging configuration. Confirm that the 20-TSSOP package dimensions match the design requirements. Ensure the component source is authorized to guarantee authenticity and traceability.

Selection Notes

Select this component when designing serial interfaces for space-constrained applications requiring low power consumption. It serves as a drop-in replacement for industry-standard MAX232 devices in 3.3V systems. Verify that the required data rate does not exceed 250kbps under standard operating conditions without utilizing MegaBaud modes available in other family members.

Part Context

This part belongs to the MAX3222E/MAX3232E series of down-to-10nA, 3.0V to 5.5V, up to 1Mbps, true RS-232 transceivers. The 'EE' variant typically denotes industrial temperature range (-40°C to +85°C), while 'EC' indicates commercial range (0°C to +70°C). The 'U' suffix specifies the TSSOP package type.

Replacement Considerations

The MAX3222E is pin, package, and functionally compatible with the industry-standard MAX232. Designers upgrading from older 5V-only RS-232 transceivers should verify capacitor values and logic voltage levels when transitioning to this 3.3V-compatible device.

FAQ

Does the MAX3222ECUP+ support MegaBaud operation?

No, the MAX3222E model does not feature MegaBaud operation. Only the MAX3237E within this family supports 1Mbps transmission rates via the MBAUD control input.

What is the behavior of the receivers during shutdown mode?

In shutdown mode (SHDN = GND), the MAX3222E receivers remain active, allowing the monitoring of external signals while consuming less than 1μA of supply current.

How many external capacitors are required for the charge pump?

The device requires only four small 0.1μF capacitors for operation from a +3.3V supply to drive the internal dual charge pump.